sisfb: replace andSISIDXREG with SiS_SetRegAND

Replace andSISIDXREG() with SiS_SetRegAND().

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
1 file changed